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1.  JavaÖÐûÓÐÒþ²Ø
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class CB {
    public  void f(){
       System.out.println("CB::f()");    
    }
}
 
class CD extends CB {
    public  void f(int a){
       System.out.println("CD::f(int)");
    }
}
 
public class MyTest {
    public static void main(String args[])
    {
       System.out.println("helloWorld");
       CD test = new CD();
       test.f();
       test.f(1);
 


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